CN101310788A - Anesthesia apparatus and calibration method of suction valve thereof - Google Patents
Anesthesia apparatus and calibration method of suction valve thereof Download PDFInfo
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Abstract
The invention discloses an anaesthetic machine, a gas path system comprises an inhalation gas path with an inhalation valve; a flow sensor is arranged in the gas path system and electrically connected with a parameter processing unit for detecting the real-time flow rate of the inhalation gas path; and the parameter processing unit transmits an electrical signal of the flow sensor to a main controller after the processing. The invention further discloses a calibration method of the inhalation valve of the anaesthetic machine, comprising the steps that the main controller controls the opening degree of a valve of the inhalation valve, and the real-time gas flow rate of the corresponding inhalation valve is obtained by the flow sensor, thus obtaining a valve opening table and a valve closing table. The usage of the anaesthetic machine of the technical proposal of the invention only adds one flow sensor, thus having low cost, convenience and practicality. The usage of the calibration method of the inhalation valve of the anaesthetic machine of the technical proposal of the invention can automatically complete the calibration of the inhalation valve after connecting the gas path by a user, thus being convenient and rapid and ensuring the mechanical ventilation of the anaesthetic machine to be more secure and reliable.
Description
Technical field
The present invention relates to a kind of anesthetic machine of medical instruments field, be specifically related to a kind of anesthetic machine that can calibrate inlet valve with and the inlet valve Calibration Method.
Background technology
Pneumatic electronic control type anesthetic machine is present the most widely used anesthetic machine, its control principle is to introduce a stable high-pressure air source as power source, and the actual gas that flows into machine control gas circuit is to be regulated by an electric control valve, master controller sucks the gas flow rate size by the operation of this valve is controlled, this valve is commonly referred to as inlet valve or air delivery valve, and its control accuracy has directly determined the performance of anesthetic machine.
Anesthetic machine is that drive current (voltage) by control valve is controlled to the control of automatically controlled admission air valve, and the size that drives the signal of telecommunication is directly corresponding to different valve output flow velocitys.Machine must obtain the corresponding curve linear relationship between each valve driving signal of telecommunication and the output flow velocity in advance in order accurately to control flow velocity.Producer generally all can demarcate the control characteristic of valve with the metrical instrument of standard when production of machinery, draws this curve linear relationship.And machine in use for some time, because extraneous and the factor affecting of valve own, the control curve of valve and when dispatching from the factory curve may occur than large deviation, for guaranteeing the normal use of ventilation control of quality and anesthetic machine, need the user to calibrate to the anesthetic machine inlet valve.
Inlet valve is the crucial control assembly of anesthetic machine, and its performance has directly determined the ventilation control of quality of anesthetic machine.Admission air valve is in frequent folding duty when anesthetic machine is worked, when especially high frequency ventilation or high speed servo-valve need the flow velocity of control variation in real time, operation to valve more reaches per second tens of even up to a hundred times, the loss of valve itself is added the aging and temperature of integrated circuit board control circuit device and is floated influence, and the control accuracy of valve may occur than large deviation.Directly influence the effect of ventilation control when the valve error is big, cause hypoventilation or hyperventilation easily, when flow transducer of anesthesia apparatus lost efficacy or do not install, most probably patient is damaged especially.For the accuracy and the safety that guarantee to ventilate and control, anesthetic machine need carry out periodic calibration to inlet valve usually.
Anesthetic machine on the market has three kinds of calibration steps at present:
The one, provide or the user provides standard air flow meter measuring appratus for oneself by producer, finish the calibration of different range valve controlling flow speed from small to large automatically with manual adjustments or machine, obtain new inlet valve control characteristic curve.Though this mode is accurate, must be by the metrical instrument of standard, hospital might not possess the flow rate detection instrument that meets alignment requirements, and producer provides and is too loaded down with trivial details, and practicality is not strong.
Second kind is the anesthetic machine inlet valve to be supplied gas directly flow to atmosphere by patient end, increase a specific vapour lock at patient end, airway pressure is risen, producer is by the specific vapour lock and the machine gas circuit situation of design, can know the relation between airway pressure and the air-flow velocity size, the user can be according to this relation by observing gas circuit pressure calibration flow velocity.But it is bigger that this mode is influenced by the gas circuit situation, be difficult to get rid of the influence of machine gas-path leakage and compliance and change in resistance, and airway pressure monitoring error is bigger, can't guarantee precision.This in addition calibrating mode also is difficult to realize for the calibration of low flow velocity.
Also there is producer directly to utilize the flow transducer of patient breathing circuit that inlet valve is calibrated, but the flow transducer of patient breathing circuit is because daily use is more, be damaged easily, and regular maintenance, deviation has appearred in the flow transducer that sterilization or periodic replacement pick off or the like factor all may cause the patient circuit to use, and so calibration can not guarantee degree of precision.
Summary of the invention
The present invention is exactly at the problems referred to above, proposes a kind of anesthetic machine, and a kind of anesthetic machine inlet valve Calibration Method, makes anesthetic machine can finish the calibration of inlet valve automatically.
To achieve the above object of the invention, the technical solution used in the present invention is: a kind of anesthetic machine comprises air-channel system, parameter processing unit, valve control unit, master controller and flow transducer; Described air-channel system comprises air-breathing gas circuit, and described air-breathing gas circuit comprises inlet valve; Described parameter processing unit, valve control unit are electrically connected with described master controller; Described valve control unit is electrically connected with described inlet valve; Described flow transducer is arranged in the described air-breathing gas circuit, is electrically connected with described parameter processing unit; Described flow transducer is used to detect the real-time flow rate of air-breathing gas circuit, and described parameter processing unit is transferred to described master controller after the signal of telecommunication of flow transducer is handled.
In the optimized technical scheme, described flow transducer is the differential flow transducer of constant aperture.
In the optimized technical scheme, described flow transducer is installed on the air inlet place or the place, gas outlet of described inlet valve.
Further in the optimized technical scheme, described valve control unit comprises valve driving circuit and digital-to-analogue driver element, and the control signal of being sent by master controller is through after digital-to-analogue driver element and the valve driving circuit, the valve folding in the control air-channel system.
Further in the optimized technical scheme, described parameter processing unit comprises amplifying circuit and AD conversion unit, the signal of telecommunication of described inlet valve flow detector amplifies through amplifying circuit, carries out being transferred to master controller after the analog digital conversion through AD conversion unit then.
A kind of anesthetic machine inlet valve calibration steps comprises the steps: the valve opening of main controller controls inlet valve, obtains the gas flow rate of corresponding inlet valve simultaneously in real time by flow transducer, obtains to open the valve harmony in the exterior and closes the valve table.
In the optimized technical scheme, comprise and obtain the maximum process of opening valve digital-to-analogue value: master controller initially leaves valve digital-to-analogue value by the valve driver element with certain and opens inlet valve, and obtain the corresponding flow velocity of initially opening valve digital-to-analogue value from flow transducer by parameter processing unit, judge whether to surpass set point again, if do not surpass set point, then strengthen the degree of opening inlet valve, surpass the scope of setting, obtain maximum and open valve digital-to-analogue value up to judging flow velocity.
Further in the optimized technical scheme, comprise and obtain the minimum process of opening valve digital-to-analogue value: master controller initially leaves valve digital-to-analogue value by the valve driver element with certain and opens inlet valve, and obtain the corresponding flow velocity of initially opening valve digital-to-analogue value from flow transducer by parameter processing unit, judge whether again less than set point, if not less than set point, then reduce to open the degree of inlet valve,, obtain minimum and open valve digital-to-analogue value up to judging flow velocity less than the scope of setting.
Further in the optimized technical scheme, obtaining inlet valve opens the detailed process of valve table and comprise: master controller leaves valve digital-to-analogue value by the valve driver element with minimum and opens inlet valve, and by the flow velocity of parameter processing unit from flow transducer acquisition correspondence, judge whether to reach maximum again and open valve digital-to-analogue value, if do not reach, then strengthen to open the degree of inlet valve, reach maximum and open valve digital-to-analogue value up to judging, record corresponding valve aperture-flow speed value obtains inlet valve and opens the valve table.
In the further again optimized technical scheme, the detailed process of obtaining inlet valve pass valve table comprises: master controller leaves valve digital-to-analogue value by the valve driver element with maximum and opens inlet valve, and by the flow velocity of parameter processing unit from flow transducer acquisition correspondence, judge whether to reach minimum again and open valve digital-to-analogue value, if do not reach, the degree of then less unlatching inlet valve reaches minimum and opens valve digital-to-analogue value up to judging, record corresponding valve aperture-flow speed value obtains inlet valve and closes the valve table.
Adopt the anesthetic machine of technical solution of the present invention, only increased a flow transducer on the basis of original anesthetic machine, not needing increases too much equipment, and cost is low, and is convenient and practical.Because this pick off places the driving gas circuit of machine intimate, driving gas is the air of dried and clean, thereby the not fragile distortion of pick off and influenced by aqueous vapor, also can get rid of anesthetic machine loop resistance, compliance and and leakage factor; Such design had both guaranteed the effect of calibration, and user's operation is also very convenient, has simplified the maintenance work of machine greatly.Adopt the anesthetic machine inlet valve calibration steps of technical solution of the present invention, can after connecting gas circuit, the user finish calibration automatically to admission air valve, do not need to add standard metering instrument or particular device, pilot process also need not human intervention, convenient and swift, make the anesthetic machine mechanical ventilation more safe and reliable.
Description of drawings
Fig. 1 is the schematic diagram of gas circuit of specific embodiment of the invention anesthetic machine inlet valve calibrating installation;
Fig. 2 is system's composition diagram of specific embodiment of the invention anesthetic machine inlet valve calibrating installation;
Fig. 3 is that the inlet valve of specific embodiment of the invention anesthetic machine inlet valve calibrating installation is demarcated control flow chart;
Fig. 4 is that the inlet valve of specific embodiment of the invention anesthetic machine inlet valve calibrating installation leaves valve and closes the valve curve chart.
The specific embodiment
The specific embodiment of the invention is mainly by breathing at original anesthetic machine on the driving gas control tubulation road of gas circuit inside, settle a reliable and stable inlet valve flow detector as the flow-speed measurement benchmark, realize automatic calibration, improve the degree of accuracy of inlet valve inlet valve.The inlet valve flow detector is an inlet valve flow transducer 3 in the present embodiment, particularly is a differential flow transducer of constant aperture.
Fig. 1 is the air-channel system schematic diagram of the anesthetic machine inlet valve calibrating installation of the specific embodiment of the invention.Drive air-flow and enter inlet valve 2 through behind the air relief valve 1.Inlet valve 2 effluent gases are known from experience inflow bellows 4 shells during operate as normal, and the folded airbag in the compression bellows 4 is finished machinery and supplied gas.Present embodiment is exactly to be provided with a flow transducer on the pipeline between inlet valve 2 and the bellows 4, and promptly the inlet valve flow transducer 3; When needing calibration inlet valve 2, for producing stable constant flow rate, need take down the folded airbag in the bellows 4, make inlet valve 2 output gas flows through sensor 3 backs directly arrange to atmosphere, the folding of control inlet valve 2 makes to be used for calibration by the constant gas that varies in size that continues in the inlet valve 2.The specific embodiment of the invention is placed on respirator inside with inlet valve flow transducer 3, and after the inlet valve 2, as shown in the figure, inlet valve flow transducer 3 is on the gas circuit between inlet valve 2 and the bellows 4.The driving gas of this section gas circuit is the gas of clean dry owing to flow through, and compares and places the patient circuit, and inlet valve flow transducer 3 can be avoided aqueous vapor and mucous influence, can guarantee the accuracy of measuring.The differential pick off of the constant aperture that present embodiment adopts, this pick off place machine intimate can guarantee can not be damaged, need not to change, and can guarantee measuring stability.
Among Fig. 15 is outlet valve, is arranged in the expiration branch road; 6 is the patient end flow transducer in the patient end gas circuit.The differential flow transducer of constant aperture is compared with the inlet valve 2 of patient end flow transducer 6 and frequent operation, and the flow monitoring signal is reliable and stable; And flow transducer 3 is near inlet valve 2, and the air-flow that can guarantee to flow through inlet valve 2 and flow transducer 3 is consistent, can not have influence on calibration accuracy because of gas leakage, the resistance of ducting or compliance etc. substantially.
As shown in Figure 2, the inlet valve calibrating installation of the embodiment of the invention comprises several parts such as air-channel system, parameter processing unit, valve control unit, master controller, memorizer and host computer.Solid line among Fig. 2 between the each several part represents that gas circuit connects, and the dotted line indication circuit connects.In the present embodiment, microprocessor is master controller; Parameter processing unit comprises amplifying circuit and AD conversion unit; Valve control unit comprises valve driving circuit and digital-to-analogue driver element.
Wherein, the signal of telecommunication of flow transducer 3 output outputs to processor through analog digital conversion again after amplifying circuit amplifies, and calculates at that time flow velocity size by processor, and is stored in the memorizer.The flow speed value that flow transducer 3 is measured during the different big or small digital-to-analogue controlling value of memory stores as inlet valve 2 real output flow velocitys, thereby obtains the control signal and the new corresponding curve linear relationship of exporting between the flow velocity of inlet valve 2.Later mechanical ventilation control serves as the control foundation with new curve just, thereby guarantees the control accuracy of inlet valve 2.Microprocessor is also regulated the size of the inlet valve 2 control signals of telecommunication by valve control unit in addition, realizes the control to inlet valve 2 output flow velocitys.Valve control unit comprises digital-to-analogue driver element and valve driving circuit in the present embodiment.Host computer is a user interface among Fig. 2, and microprocessor carries out communication by serial ports and host computer, and user is by telling to the operation of host computer which kind of action microprocessor carries out, and microprocessor sends to host computer with the needed information of user.
In the time of anesthetic machine work, can compare according to inlet valve flow transducer actual measured value and inlet valve setting value and judge whether needs calibration of inlet valve.If inlet valve is inaccurate, anesthetic machine can give the alarm, and the prompting user calibrates inlet valve.The user only need remove the folded airbag in the bellows 4, guarantees to provide the driving gas of steady pressure, confirms that by the button on the host computer back machine begins calibration automatically; The user also can initiatively calibrate inlet valve by host computer in addition.
Machine begins inlet valve is calibrated, mainly exactly inlet valve is demarcated again, promptly obtain new opening the valve curve and close the valve curve, this preprocessor is newly opened the valve curve and is closed the control basis of valve curve as inlet valve with what obtain, just can accurately control the flow of inlet valve, promptly reach the purpose of calibration inlet valve.
Demarcate control flow chart referring to Fig. 3 based on the inlet valve of the automatic calibration device of inlet valve of this device, control flow is as follows in detail:
At first microprocessor can leave inlet valve 2 with certain initial value, and from the corresponding flow velocity of ventilation end flow transducer 3 acquisitions, judge again whether flow velocity surpasses set point, if do not surpass set point, then strengthen the degree of opening inlet valve 2, obtain corresponding flow velocity from ventilation end flow transducer 3 again, surpass set point, just obtained maximum and opened valve digital-to-analogue value up to judging flow velocity.
Microprocessor leaves inlet valve 2 with certain initial value more then, and from the corresponding flow velocity of ventilation end flow transducer 3 acquisitions, judge that more whether flow velocity is less than set point, if not less than set point, then reduce to open the degree of inlet valve 2, obtain corresponding flow velocity from ventilation end flow transducer 3 again,, just obtained minimum and opened valve digital-to-analogue value up to judging flow velocity less than set point.
Microprocessor leaves valve digital-to-analogue value with minimum again and opens inlet valve 2, and from the corresponding flow velocity of ventilation end flow transducer 3 acquisitions, judge whether to reach maximum again and open the valve digital-to-analogue, if do not reach, then strengthen the degree of opening inlet valve 2, obtain corresponding flow velocity from ventilation end flow transducer 3 again with certain step pitch, and with each step open valve digital-to-analogue value and flow speed value is stored in the memorizer, reach maximum and open valve digital-to-analogue value up to judging, just obtained inlet valve and opened the valve table.
Last microprocessor is opened valve digital-to-analogue value with maximum again and is opened inlet valve 2, and from the corresponding flow velocity of ventilation end flow transducer 3 acquisitions, judge whether to reach minimum again and open the valve digital-to-analogue, if do not reach, then reduce to open the degree of inlet valve 2 with certain step pitch, obtain corresponding flow velocity from ventilation end flow transducer 3 again, and with each step open valve digital-to-analogue value and flow speed value is stored in the memorizer, reach minimum and open valve digital-to-analogue value up to judging, just obtain inlet valve and closed the valve table, then inlet valve is left valve harmony in the exterior pass valve table and deposit in the memorizer, so far inlet valve is demarcated the control flow end.
Above flow process briefly is exactly to obtain earlier that maximum is opened valve digital-to-analogue value and minimum is opened valve digital-to-analogue value, further obtains to open the valve harmony in the exterior then and closes the valve table.It should be noted that, open inlet valve from small to large, obtain the control digital-to-analogue value that inlet valve produces the correspondence of minimum and maximum controllable flow rate, valve control signal is when 0 is increased to maximum, initially have a segment limit can not have flow velocity to produce, and control signal increases to after certain scope, flow velocity also can not increase again, have only a middle part to be only effective span of control, machine can be made the controlled range size that valve need be calibrated in view of the above.Determine by valve characteristic in addition, the curve that curve that its controlled quentity controlled variable of the control curve of valve increases and controlled quentity controlled variable reduce does not overlap, as shown in Figure 4, being valve is increased to certain control signal and when big aperture is reduced to this control signal from little aperture, the flow velocity size of output is inconsistent, therefore need calibrate ascending curve of the control signal of valve and descending curve respectively, we are called out the valve curve and close the valve curve, as shown in Figure 4, V represents driving voltage among the figure, promptly opens valve digital-to-analogue value, and F represents the flow velocity of inlet valve, curve A is out the valve curve among the figure, and curve B is closes the valve curve.
When the valve curve is opened in calibration, microprocessor is according to certain rule, arrive in the maximum span of control in the controlled minimum of valve, order output control signal from small to large also keeps a period of time, flow velocity Deng the steady back of air-flow reading flow quantity sensor 3, this flow velocity is exactly out the output flow velocity of this control digital-to-analogue value correspondence in the valve curve, so repeat, according to the control accuracy requirement, machine can obtain several different control digital-to-analogue value corresponding valve output flow velocitys from small to large automatically, memorizer record is sizes of all these control digital-to-analogue values and corresponding flow velocity down, and what can simulate an admission air valve opens the valve curve, shown in A among Fig. 4.In the control afterwards, valve increases output gas flow to certain value if desired, only needs to open the valve curve A according to this and finds the corresponding valve control digital-to-analogue value of opening, and processor gets final product to admission air valve according to this digital-to-analogue value output control signal of telecommunication.Same, microprocessor by descending order progressively successively decrease the control inlet valve and after each vary stable the measurement flow rate of reading flow quantity sensor 3, just obtain the pass valve curve of admission air valve, shown in B among Fig. 4.In the control afterwards, valve reduces output gas flow to certain value if desired, only needs to find corresponding pass valve control digital-to-analogue value according to this pass valve curve B, and microprocessor gets final product for inlet valve 2 according to this digital-to-analogue output control signal of telecommunication.
In the specific embodiment of the invention, because inlet valve flow transducer 3 directly links to each other with the gas circuit at inlet valve 2 places, the flow transducer that its measurement flow rate is compared other positions is subjected to disturb very little, can directly represent the actual output of inlet valve 2, so in the actual ventilation control, this inlet valve flow transducer 3 can also not calibrated and can accurately control under the less situation of inlet valve 2 deviations even guarantee with doing that inlet valve 2 is done the fine setting feedback.
What the inlet valve flow transducer 3 in the specific embodiment of the invention adopted is the differential flow transducer of constant aperture, but also it can be changed to the flow rate measuring device that other can maintain a long-term stability and measure, and its installation site is not limited to be right after after the inlet valve 2, also can place before the inlet valve 2, as long as guarantee that the gas flow that flows through wherein is consistent with inlet valve 2.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1, a kind of anesthetic machine comprises air-channel system, parameter processing unit, valve control unit, master controller; Described air-channel system comprises air-breathing gas circuit, and described air-breathing gas circuit comprises inlet valve; Described parameter processing unit, valve control unit are electrically connected with described master controller; Described valve control unit is electrically connected with described inlet valve; It is characterized in that: also comprise flow transducer, described flow transducer is arranged in the described air-breathing gas circuit, is electrically connected with described parameter processing unit; Described flow transducer is used to detect the real-time flow rate of air-breathing gas circuit, and described parameter processing unit is transferred to described master controller after the signal of telecommunication of flow transducer is handled.
2, anesthetic machine according to claim 1 is characterized in that: described flow transducer is the differential flow transducer of constant aperture.
3, anesthetic machine according to claim 1 is characterized in that: described flow transducer is installed on the air inlet place or the place, gas outlet of described inlet valve.
4, according to arbitrary described anesthetic machine in the claim 1 to 3, it is characterized in that, described valve control unit comprises valve driving circuit and digital-to-analogue driver element, the control signal of being sent by master controller is through after digital-to-analogue driver element and the valve driving circuit, the inlet valve folding in the control air-channel system.
5, according to arbitrary described anesthetic machine in the claim 1 to 3, it is characterized in that, described parameter processing unit comprises amplifying circuit and AD conversion unit, the signal of telecommunication of described flow detector amplifies through amplifying circuit, carries out being transferred to master controller after the analog digital conversion through AD conversion unit then.
6, a kind of anesthetic machine inlet valve calibration steps comprises the steps: the valve opening of main controller controls inlet valve, obtains corresponding inlet valve gas flow rate in real time by flow transducer simultaneously, and the valve harmony in the exterior of opening that obtains inlet valve closes the valve table.
7, anesthetic machine inlet valve calibration steps according to claim 6 is characterized in that: comprise the maximum process of opening valve digital-to-analogue value that obtains:
Master controller initially leaves valve digital-to-analogue value by the valve driver element with certain and opens inlet valve, and obtain the corresponding flow velocity of initially opening valve digital-to-analogue value from flow monitor by parameter processing unit, judge whether to surpass set point again, if do not surpass set point, then strengthen the degree of opening inlet valve, surpass the scope of setting up to judging flow velocity, obtain maximum and open valve digital-to-analogue value
8, according to claim 6 or 7 described anesthetic machine inlet valve calibration steps, it is characterized in that, comprise the minimum process of opening valve digital-to-analogue value that obtains:
Master controller initially leaves valve digital-to-analogue value by the valve driver element with certain and opens inlet valve, and obtain the corresponding flow velocity of initially opening valve digital-to-analogue value from flow monitor by parameter processing unit, judge whether again less than set point, if not less than set point, then reduce to open the degree of inlet valve, up to judging flow velocity, obtain minimum and open valve digital-to-analogue value less than the scope of setting.
9, anesthetic machine inlet valve calibration steps according to claim 8 is characterized in that, obtains inlet valve and opens the detailed process of valve table and comprise:
Master controller leaves valve digital-to-analogue value by the valve driver element with minimum and opens inlet valve, and by the flow velocity of parameter processing unit from flow monitor acquisition correspondence, judge whether to reach maximum again and open valve digital-to-analogue value, if do not reach, then strengthen the degree of opening inlet valve, reach maximum and open valve digital-to-analogue value up to judging, record corresponding valve aperture-flow speed value, what obtain inlet valve opens the valve table.
10, anesthetic machine inlet valve calibration steps according to claim 8 is characterized in that, the detailed process of obtaining inlet valve pass valve table comprises:
Master controller leaves valve digital-to-analogue value by the valve driver element with maximum and opens inlet valve, and by the flow velocity of parameter processing unit from flow monitor acquisition correspondence, judge whether to reach minimum again and open valve digital-to-analogue value, if do not reach, the degree of then less unlatching inlet valve, reach minimum and open valve digital-to-analogue value up to judging, record corresponding valve aperture-flow speed value obtains inlet valve and closes the valve table.
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| CN102266631A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗***股份有限公司 | Method and device for inspecting PEEP (positive end expiratory pressure) valve |
| CN102397616A (en) * | 2010-09-07 | 2012-04-04 | 北京航天长峰股份有限公司 | Automatic calibration method for sensor of breathing machine |
| WO2012045264A1 (en) * | 2010-10-09 | 2012-04-12 | 深圳迈瑞生物医疗电子股份有限公司 | Oxygen battery base assembly, oxygen battery assembly and anesthesia machine |
| CN103285483A (en) * | 2013-06-05 | 2013-09-11 | 深圳市瑞沃德生命科技有限公司 | Precise propelling type electronic anesthesia machine |
| CN103893882A (en) * | 2012-12-28 | 2014-07-02 | 北京谊安医疗***股份有限公司 | Method and device for correcting anaesthesia-machine flow |
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| CN103908725A (en) * | 2012-12-29 | 2014-07-09 | 北京谊安医疗***股份有限公司 | Electric control breathing machine or anesthesia machine proportional valve based automatic calibration method |
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| CN102397616B (en) * | 2010-09-07 | 2014-11-05 | 北京航天长峰股份有限公司 | Automatic calibration method for sensor of breathing machine |
| WO2012045264A1 (en) * | 2010-10-09 | 2012-04-12 | 深圳迈瑞生物医疗电子股份有限公司 | Oxygen battery base assembly, oxygen battery assembly and anesthesia machine |
| CN102266631A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗***股份有限公司 | Method and device for inspecting PEEP (positive end expiratory pressure) valve |
| WO2012089084A1 (en) * | 2010-12-31 | 2012-07-05 | 北京谊安医疗***股份有限公司 | Method and device for calibrating peep valve |
| CN103893891B (en) * | 2012-12-26 | 2016-03-02 | 北京谊安医疗***股份有限公司 | A kind of method of calibration of respirator non-linear ratio valve |
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Inventor after: Huang Lintao Inventor after: Zhou Xiaoyong Inventor after: Pan Ruiling Inventor after: Li Xinsheng Inventor before: Huang Lintao Inventor before: Zhou Xiaoyong Inventor before: Pan Ruiling Inventor before: Li Xinsheng |